Chapter 1: introduction

Seite 1

Chapter 1: Introduction

Electronic Communication System

Elements of a Communication System

Transmission Mode

Power Gain and Voltage Gain

1. Electronic Communication System:

Purpose:

Transfer information from one place to another.

Information is transmitted, processed and received using electronic circuits.

Power Gain & Voltage Gain: In terms of ratio:

For power, Ap = Poutput/Pinput [unitless]

For voltage, Av = Voutput/Vinput [unitless]

In terms of Decibels:

For power, Ap = 10 log10 (Poutput/Pinput) [dB]

For voltage, Av = 20 log10 (Voutput/Vinput) [dB]

Elements of a Communication System